1. Laboratory of Biosensing Engineering, Graduate School of Agriculture; Kyoto University; Kitashirakawa Kyoto Japan
2. Department of Agricultural Engineering, Faculty of Agricultural Technology; University of Brawijaya; Jl. Veteran Malang Indonesia
3. Department of Mechanical and Biosystem Engineering; Bogor Agricultural University; Kampus IPB Darmaga, PO Box 220 Bogor West Java Indonesia
4. Center for Tropical Horticulture Studies, IPB; Bogor Indonesia